'What is he doing?' - Ruben Amorim told he has a Manchester United problem that needs addressing

It was another tough weekend for Manchester United as they slumped to a 3-2 defeat against Nottingham Forest.

Rasmus Hojlund and Bruno Fernandes were on target for the home side but their goals weren't enough to stop Ruben Amorim from suffering a second defeat as United head coach.

Fans have been having their say on the performance and a number of them have raised concerns about Lisandro Martinez's performances this season. Martinez struggled again on Saturday, being beaten in the air for Forest's first goal and failing to clear the ball on the line as Chris Wood's decisive header bounced into the net.

You can read our player ratings from the game by clicking here, but here's a quick look at how fans reacted to the defeat:

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Msmdee: "What on earth has happened to Lisandro Martinez? Even last season, struggling with injuries, he was still a giant that helped us win FA Cup final, with Pep even putting him in top 5 of best defenders. This season he is so bad."

Andrewdev: "So many tears from people. Did people really expect a new coaching teams and set-up mid-season to just click? At times we played good football, let down by Onana’s comical error and Martinez standing on the line and watching the ball pass him. Definitely signs and attack will always take longer to click. We are what we are."

Kewhere: "Onana and Martinez both should have been replaced with immediate effect. Set a standard. Onana terrible against Arsenal, unable to come for corners, and today conceded a seriously soft goal. Martinez on the back post - what is he doing? They need to understand if their performance isn't good enough then they will be taken off."

Jrthered: "Frustrating performance! Moments of quality and fluid play ruined by such carelessness! Bruno is fantastic and infuriating in equal measure - creative and works hard yet makes so many avoidable mistakes, such as the ridiculous flick that led to their goal. Love Licha, but his form is worrying at the moment, and again daft mistake to let Wood's looping header dribble past him.

"Onana had one of his awful games and I'm amazed Gibbs-White's shot wasn't easily stopped. The regular mistakes in games HAVE to stop! On a plus note - Amad, great again although quieter today. Mazraoui should've started - he's a brilliant player. Hojlund did ok, particularly first half. I think the pivot of Mainoo and Ugarte needs to be persevered with. I'm sure Amorim will sort the mess out though!"